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Create a multiplication table class of variable length

Level: Intermediate (score: 3)

Danny does not like rote learning (nor do we!). He is asked to remember multiplication tables of considerable size 😭

Can you give him a hand so he can focus on more interesting things again? (OK maybe HE is the one who should learn Python 😂)

Complete the MultiplicationTable class below implementing the following methods:

• Use __init__ (constructor) to store the (x,y) coordinates and their multiplication result in a data structure (say in self._table).
• __len__ should return the area of the table (len x* len y)
• __str__ should give a visual representation of the table, for example a 3x3 length table should return this str:

   1 | 2 | 3
   2 | 4 | 6
   3 | 6 | 9
  

• The calc_cell method should take a x and y coordinate and return the result multiplying them. If x/y are out of range, raise an IndexError.

Good luck and have fun!